From: Reuben Thomas <rrt@sc3d.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Andreas Schwab <schwab@linux-m68k.org>, 17036@debbugs.gnu.org
Subject: bug#17036: Continuation for Emacs: invoking a process on exit?
Date: Wed, 19 Mar 2014 21:14:22 +0000 [thread overview]
Message-ID: <CAOnWdohMHkn8zDHikRHnGof=kOXLV0pqpTfA5y_w8OUX8m1-Mw@mail.gmail.com> (raw)
In-Reply-To: <8361na9lom.fsf@gnu.org>
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On 19 March 2014 16:51, Eli Zaretskii <eliz@gnu.org> wrote:
> > Date: Wed, 19 Mar 2014 13:19:28 +0000
> > From: Reuben Thomas <rrt@sc3d.org>
> > Cc: Andreas Schwab <schwab@linux-m68k.org>, 17036@debbugs.gnu.org
> >
> > On 19 March 2014 13:10, Stefan <monnier@iro.umontreal.ca> wrote:
> >
> > > > I could imagine a `restart-emacs' command having some small utility.
> > >
> > > Could the w32 build support something like POSIX's `exec'?
> >
> >
> > Windows has execvp...
> http://msdn.microsoft.com/en-us/library/3xw6zy53.aspx
>
> Don't believe the sales people. MS's execvp is buggy, and even if we
> forget about those bugs, it won't do what is expected here: it won't
> keep the file descriptors open in the original process still open in
> the overlaid process. That's because there's no 'exec' system call on
> Windows, so execvp is _emulated_: the original process simply invokes
> the new one as its child process, and then immediately exits.
>
That's good enough for restart-emacs.
> So the answer to Stefan is: no, this cannot be done on Windows, not
> without some custom code to let the re-executed Emacs inherit all of
> the file descriptors which were open in the original Emacs process.
>
It's fine for what i had in mind, namely Emacs simply launching another
command with arguments, much as a Lisp callcc. This could be documented as
a limitation on Windows.
--
http://rrt.sc3d.org
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next prev parent reply other threads:[~2014-03-19 21:14 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-18 22:47 bug#17036: Continuation for Emacs: invoking a process on exit? Reuben Thomas
2014-03-18 22:52 ` Andreas Schwab
2014-03-18 22:56 ` Reuben Thomas
2014-03-19 6:27 ` Glenn Morris
2014-03-19 13:10 ` Stefan
2014-03-19 13:19 ` Reuben Thomas
2014-03-19 16:51 ` Eli Zaretskii
2014-03-19 21:14 ` Reuben Thomas [this message]
2014-03-20 3:45 ` Eli Zaretskii
2014-03-20 12:02 ` Reuben Thomas
2014-03-20 17:43 ` Eli Zaretskii
2014-03-20 23:10 ` Reuben Thomas
2014-03-21 7:53 ` Eli Zaretskii
2014-03-21 10:09 ` Reuben Thomas
2014-03-21 10:18 ` Reuben Thomas
2014-03-21 10:18 ` Eli Zaretskii
2014-03-21 10:25 ` Reuben Thomas
2022-04-17 11:38 ` Lars Ingebrigtsen
2022-04-17 11:56 ` Reuben Thomas via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-04-17 11:57 ` Eli Zaretskii
2022-04-17 12:08 ` Lars Ingebrigtsen
2022-04-17 12:34 ` Eli Zaretskii
2022-04-17 12:41 ` Eli Zaretskii
2022-04-17 12:52 ` Lars Ingebrigtsen
2022-04-17 12:49 ` Lars Ingebrigtsen
2022-04-17 14:37 ` Eli Zaretskii
2022-04-17 14:49 ` Lars Ingebrigtsen
2022-04-17 15:51 ` Eli Zaretskii
2022-04-18 8:48 ` Lars Ingebrigtsen
2022-04-18 9:28 ` Eli Zaretskii
2022-04-17 14:29 ` Eli Zaretskii
2022-04-17 15:58 ` Eli Zaretskii
2022-04-17 16:02 ` Lars Ingebrigtsen
2022-04-17 17:49 ` Eli Zaretskii
2022-04-18 8:53 ` Lars Ingebrigtsen
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